Earthquake with magnitude of Md 3.1 on date 02-03-1991 and time 23:20:49 (Italy) in region 3 km S Monteflavio (RM)

A magnitude Md 3.1 earthquake occured in region: 3 km S Monteflavio (RM), on

  • 02-03-1991 22:20:49 (UTC)
  • 02-03-1991 23:20:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.082, 12.839 at 4 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monteflavio RM 3 1348 1348
Licenza RM 5 1011 2359
Roccagiovine RM 6 263 2622
Palombara Sabina RM 6 13269 15891
Percile RM 6 255 16146
Moricone RM 7 2650 18796
Montorio Romano RM 7 1984 20780
Marcellina RM 7 7280 28060
San Polo dei Cavalieri RM 8 2992 31052
Vicovaro RM 9 4019 35071
Mandela RM 9 917 35988
Scandriglia RI 9 3108 39096
Orvinio RI 10 405 39501
Nerola RM 10 1926 41427
Montelibretti RM 10 5323 46750
Cineto Romano RM 11 601 47351
Sant'Angelo Romano RM 12 5018 52369
Castel Madama RM 12 7399 59768
Saracinesco RM 13 185 59953
Guidonia Montecelio RM 13 88673 148626
Vallinfreda RM 13 283 148909
Sambuci RM 13 925 149834
Riofreddo RM 14 781 150615
Tivoli RM 14 56533 207148
Pozzaglia Sabina RI 14 360 207508
Poggio Moiano RI 14 2751 210259
Vivaro Romano RM 14 182 210441
Roviano RM 14 1351 211792
Anticoli Corrado RM 15 915 212707
Poggio Nativo RI 15 2622 215329
Arsoli RM 15 1586 216915
Turania RI 16 241 217156
Ciciliano RM 16 1336 218492
Toffia RI 16 1058 219550
Frasso Sabino RI 17 743 220293
Fara in Sabina RI 17 13742 234035
Monteleone Sabino RI 17 1224 235259
Oricola AQ 17 1244 236503
Colle di Tora RI 17 372 236875
Mentana RM 17 22921 259796
Marano Equo RM 18 779 260575
Paganico Sabino RI 18 172 260747
Castel di Tora RI 18 288 261035
San Gregorio da Sassola RM 18 1619 262654
Ascrea RI 18 234 262888
Collalto Sabino RI 18 442 263330
Castelnuovo di Farfa RI 19 1059 264389
Monterotondo RM 19 40830 305219
Poggio San Lorenzo RI 19 589 305808
Casaprota RI 19 744 306552
Cerreto Laziale RM 19 1118 307670
Agosta RM 19 1765 309435
Collegiove RI 19 213 309648
Casape RM 20 744 310392
Mompeo RI 20 530 310922
Rocca di Botte AQ 20 856 311778

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Guidonia Montecelio (88673 inhabitants)
14 Km N of Tivoli (56533 inhabitants)
36 Km NE of Roma (2864731 inhabitants)
44 Km N of Velletri (53303 inhabitants)
54 Km NE of Pomezia (62966 inhabitants)
55 Km SW of L'Aquila (69753 inhabitants)
56 Km S of Terni (111501 inhabitants)
56 Km N of Aprilia (73446 inhabitants)
60 Km NE of Fiumicino (78395 inhabitants)
68 Km N of Latina (125985 inhabitants)
71 Km SE of Viterbo (67173 inhabitants)
73 Km N of Anzio (54211 inhabitants)
86 Km E of Civitavecchia (52991 inhabitants)
96 Km SW of Teramo (54892 inhabitants)
98 Km S of Foligno (57155 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.1
ML-VAX 2.2
1991-03-02
22:20:49
42.082 12.839 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 136979
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-03-02 22:20:49 ± 0.108
Latitude 42.0820 ± 0.0054
Longitude 12.8390 ± 0.0106
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 136979

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.01773
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 136979
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:07:43

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 136979
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1991-03-02T22:21:41.77 10.0 undecidable manual SN 337 0.015 0.47 0.3
--.ARV.Z. 1991-03-02T22:21:34.50 10.0 undecidable manual SN 3 0.0127 -0.84 0.1
--.PGD.Z. 1991-03-02T22:21:24.17 10.0 undecidable manual PN 335 0.0177 0.6 0.5
--.ASS.Z. 1991-03-02T22:21:24.20 10.0 undecidable manual SG 352 0.0089 -0.15 0.7
--.SFI.Z. 1991-03-02T22:21:24.35 10.0 undecidable manual PN 338 0.0176 0.91 0.2
--.RSM.Z. 1991-03-02T22:21:21.86 10.0 undecidable manual PN 351 0.0168 -0.31 1
--.CRE.Z. 1991-03-02T22:21:20.50 10.0 undecidable manual PN 337 0.015 0.6 0.6
--.ARV.Z. 1991-03-02T22:21:16.43 10.0 undecidable manual PN 3 0.0127 0.43 1
--.DUI.Z. 1991-03-02T22:21:14.80 10.0 undecidable manual PN 108 0.0115 0.02 1.6
--.MAO.Z. 1991-03-02T22:21:13.30 10.0 undecidable manual PN 285 0.0116 -0.95 0.2
--.RFI.Z. 1991-03-02T22:21:11.73 10.0 undecidable manual PN 132 0.0104 -0.7 0.5
--.ASS.Z. 1991-03-02T22:21:09.50 10.0 undecidable manual PG 352 0.0089 -0.61 0.8
--.AQU.Z. 1991-03-02T22:21:09.70 10.0 undecidable manual SG 56 0.0045 0.5 0.4
--.AZI.Z. 1991-03-02T22:21:07.41 10.0 undecidable manual SG 101 0.004 0.31 0.6
--.MNS.Z. 1991-03-02T22:21:02.70 10.0 undecidable manual SG 339 0.0029 -0.09 0.7
--.RDP.Z. 1991-03-02T22:21:02.80 10.0 undecidable manual SG 195 0.003 0.2 0.7
--.RMP.Z. 1991-03-02T22:21:00.95 10.0 undecidable manual SG 200 0.0026 0.15 0.7
--.AQU.Z. 1991-03-02T22:21:00.46 10.0 undecidable manual PG 56 0.0045 -0.08 1.9
--.AZI.Z. 1991-03-02T22:20:59.43 10.0 undecidable manual PG 101 0.004 -0.26 1.6
--.CP9.Z. 1991-03-02T22:20:58.75 10.0 undecidable manual SG 159 0.0021 -0.02 0.8
--.RDP.Z. 1991-03-02T22:20:57.80 10.0 undecidable manual PG 195 0.003 -0.02 1.9
--.MNS.Z. 1991-03-02T22:20:56.72 10.0 positive manual PG 339 0.0029 -0.13 3.6
--.RMP.Z. 1991-03-02T22:20:56.18 10.0 undecidable manual PG 200 0.0026 0.12 1.8
--.CP9.Z. 1991-03-02T22:20:55.60 10.0 undecidable manual PG 159 0.0021 0.17 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download